#include <bits/stdc++.h>
using namespace std;

#define ONLINE_JUDGE

#ifndef ONLINE_JUDGE
#define dbg(x...) { cerr << "\033[32;1m" << #x << " -> "; err(x); }
void err() { cerr << "\033[39;0m" << endl; }
template<typename T, typename... A>
void err(T a, A... x) { cerr << a << ' '; err(x...); }
#else
#define dbg(...)
#endif

typedef long long LL;
const int N = 5e6+5;

int n0, n1;

char s[N];
int main(int argc, char const *argv[])
{
	int n;
	scanf("%d", &n);
	scanf("%s", s);
	for (int i=0; i<n; ++i)
	{
		if (s[i] == 'L') ++n0;
		else ++n1;
	}
	printf("%d\n", n0 + n1 + 1);
	return 0;
}